Valve cock



Aug, 2s, 192s.

REID ET A'- vALvE COCK Filed Nov. 1925 Patented Aug. 28, 1928.

UNITED Pa'rlazNTg OFFICE.

JAMES REID AND GEORGE R. WELCH, OF SYRACUSEZ NEW -YORK, A'SSIGNOR-S TO y PIERCE, BUTLER & PIERCE MANUFACTURING CORPORATION, OF SYRACUSE, NEW

YORK, A CORPORATION 0F NEW YORK.

VALVE COCK.

Appncation med November a, 1925. serial No. 66,548;

This invention relates to valves of the screw compression type commonly used in steam and hot water or vapor distributing systems but is equally useful as a water lfaucet and in any other relations where it is desired to control the flow of fluid whether in a liquid or gaseous form.

The screws for operating these valves are usually of steep pitch for expediting the openn ing and closing of the valve and in the ordinary valve of this type the unequal expansion and contraction of the movable and fixed parts together with the steep pitch of the thread causes more or less opening of the valve, particularly under kvarying temperatures even though it may be firmly closed by hand at any temperature.

The main object ofthe present invention is to provide simple'and efficient means for compensating for this inequality of expansion and contraction by the provision ofresilient means such as a coiled'spring for yieldingly holding the valve disk to its seat under the varying relations between the movable and fixed parts due to such unequal expansion and contraction.

In other words,` we have sought to prevent the unwinding of the valve operating screw under the conditions mentioned.

Other objects and uses relating to specific parts of the valve structure will be brought out in the following description.

AIn the drawings Figure 1 is a face view of a globe-cock e1nbodying thevarious features of my invention.

Figure 2 is a longitudinal lsectional viewof the same device taken on line 2-2, Figure 1. in which the valve is shown as closed but not under spring pressure.

Figure 3 is a longitudinal sectional view of the valve case showing the valve and screw and also the stem and handle in elevation and the valve under pressure of the spring.

Figure 4 is a transverse sectional view taken in the plane of line 4-4, Figure 2.

As illustrated, this valve mechanism comprises a case 1- having a valvey chamber -2- provided with passages' -3- and -4- for the passage of fluid through the valve chamber, said case being provided with the usual partition 5*n having a port -GM connecting .the passages 3 and 44.-. The partition Aw5-- .is provided with a' valve seat -7- adapted to be engaged by a mov able valve member #-8- consisting in this instance of a metal disk -8- and a fibre or equivalentpacking ring -8--.

The disk `-8- is provided with a threaded stem -9- engaged by a nut #-10- .which in turn is provided with an annular flange 11M for lclamping the fibre section n8- in the adjacent recessed end of the' disk -8-.

The inner end of the disk -8- is provided with an annular shoulder -12-l which is crimped over and upon the adjacent beaded end .13- of a. right hand screw sleeve *14% for swivel'connection with the screw.

The screw -14 is threaded externally and is provided a central lengthwise opening -15- of angular or square cross sec` tion for receiving .an operating Istem or shaft -16- of similar cross section. v

j The stem ,-16.-' extended through a packing -17-in the'outer. end of a cap section -18- which is screwed in a threaded opening in the adjacentend of the case section ,-1- and which is provided with an an'- nular flange -18-` abutting against the adjacent end'of the case'section -1- when the capsectionis tightly screwed yin place thereby forming apart of the valve'case.

The intermediate portion'as --16- of the stem -16-` passing through the packing -17- is preferably cylindrical while the outer end extends somev distance beyond the corresponding end of the cap -18`-- and is preferably angular or square in cross section at -16.- for receiving'a metal sleeve 1`9- of `sirnilaiinternal cross section', said sleeve being'tig'htly seated in the inner end ofa suit-v able handle -20- to form a part thereof.

The hubof the handle including thesleeve -19'-,- is provided with a radial threaded opening kfor receiving a set screw -21- by which the'handlef-:ZO- is firmly secured to the outer endk w16 3H of the stem -16-.,

The .portion of the stem '16- passing through and beyond the packing 17vis of slightly less diameter than the inner end of the stem to form a shoulder againstvwhich is fixed any annular collar -22- forminga unitary'part of the stem and abutting against the the collar -QQ- to form a seat for one end of a coiled spring 24e-f which is located in a recess or socket in the inner end of the cap section -l8.

A nut 25 is engaged with the external threads of the screw-M and is provided with an annular flange 4426- normally resting upon an internal annular' shoulder 27 on the case -l. l

The thickness of the flange -26 on the nut 25;- is somewhat less than the distance between the annular shoulder -27- and the inner end of the cap section l8- to allow a limited endwise movement of the nut relatively to the case --l-. l

The inner end of the coiled spring 24e-is engaged'with; the outer end ol' the nut 525 and, as previously stated, has its outer end engaged with the washer -23- so that when the screw m14- is rotated in the nut to close the valve -87- against its seat m7- the continued rotation ot' the valve screw alter the valve has engaged its seat will draw the nut 259- ontwardly against the action of the spring -Qt-nnt-illimited by the inner end of the cap *18ethereby holding the valve under yicldingpressure against its seat.

Suit-able means is provided forholding the nut Q- against rotation consisting in this instance of grooves or guide ways 28 in diametrically opposite walls of the valve case -l-and ribs -28"-y on diametrically opposite sides of the nut slidable in the grooves Q8-- shown in Figure 4.

Operation.

The exter-nal threads .of the screw sleeve M are of relatively steep pitch for ell'ecting a quick opening and closing of the valve which when closed is heldagainst rotation by frictional engagement withits valve seat as the screw continues to rotate for compressing the spring .-24, thereby reducing the wear upon the face of the valve and valve seat.

lVhen the parts are assembled for operation as shown in the drawings, the stem -16- carrying the handle -20 will be held against endwise .movement by the interposition of the collar '-22- between the washer -235- andadjacentend of the cap ml8.

Now as .the handle *20-wis rotated in a clockwise 4 direction the Screw sleeve -14cwill be rotated in la similar .direction in the nut thereby `forcing the sleeve 14 and valve ,-8,- inwardly lruntil the valve Then `by the continnedrotation of thehandie 20%g andscrew `1t in the same direction the -nnt 2b-f will be drawn outwardly bythe screw against the action of .the spring `2t until limited by the inner end ofthe ca p whichstops the rotation of the screw in a clockwisefdirection and places the closed valve under the pressure of the spring 21l4 and screw -1457 The rotation of the handle 20n and screw 14- in a counter-clockwise directionl when the valve is closed will first allow the nut Q5- to be forced inwardly until stopped by the engagement of its flange -26- with ,the shoulder 27H after which the' continued rotation ci the screwin a vcounter clockwise direction will quickly open the valve to the extent desired,it being understood that the nut -25- and valve 8n are spaced a sutlicient distance apart to permit full opening of the valve.

l lV hat we claim is: I

l. In a valve of the character describecha case having a valve seat `and axially spaced shoulders, a nut having a limited axial movement in the case between said shoulders and toward and from theval-ve seat and springpressed toward said scat, a valve movable into and out-ol engagement with saidseat, and a screw engaged with the nut :tor closing the valve and for moving the nut against the action of its spring for yi eldingly holdingthe valve in its closed position, and means for rotating the screw, said screw having an in` dependent axial movement relativelyto its rotating means.

2. In a valve ofthe, character described, a valve case having a valve seat, a ,valve mov?` able into and out ot' engagement with the seat, a nut having a limited axial movement, means for holding the nut against rotation, a spring for pressingtheYnut'toward the valve seat, a screw engaging the nutand valve' for closing and opening the valve and rfor moving the nut axiallyagainstthe action oit its spring after lthevvalve is closed, and `means `for rotatl i ing the screw, said screw being movable axially relatively toits rotating means.

3. Valve operating means including a screw and a nut engaged therewith and each movable axially relativelyto the other by a relative rotation ot the screw, means for holding the nut against rotation, a l'valve swivel connected to the screw, aspring for exerting pressure upon the nut vinthe direction ot' closing movement oit the valve, and means for rotating the screw, saidscrew being movable relatively to its rotating means.

l. Valve-operating `means i comprising a screw, a valve mounted on the screw, means Jfor rotating .the screw, said screw being mov able axially relatively toA its `rotating imeans, a nut engaged with the screw and having a limited endwise movement, means for limiting the endwise movement of the nutand a coiled spring for exerting pressure upon the nut in L the direction ot' `closing movement 'of ,the .valve and means Ifor holding the nut against rotation. l

5. Valve-operating mechanism comprising in combination with a valve, a screw rotatably engaged with lthe valve and provided withfa central `lengthwise opening of angular cross section, a stem otsimilar cross section enter lll ing said opening, means for rotating the stem and thereby rotating the screw, said screw being movable axially relatively thereto, ai

nut engaged with the screw and having a limited endwise movement, means for limiting the endwise movement of the nut, means for holding the nut against rotation, and a spring for exerting pressure upon the nutvin the direction of closing movement of the valve.

6. The combination with a valve case having a recess with a packing therein and a valve seat co-axial therewith and in spaced relation thereto, a stem rotatable in the pack- `ing and provided with external means for rotating it, means for holding the stem against outward axial movement, a screw splined on the stem, a valve loosely mounted on the screw to permit relative rotation of the screw and valve, a nut engaging the screw and having a limited endwise movement relaf tively to the screw and valve case, means for limiting the endwise movement of the nut, means for holding the nut against rotation, and a spring exerting presure upon the nut in the direction of closing movement of the valve.

7. In a valve-operating mechanism, the

combination with a valve case having a pack@ ing and a valve seat, of a stem rotatable in the packing and provided with external means for rotating it, means for holding the stem against axial movement, a screw splined on the stem to be rotated thereby and movable axially relatively thereto, a valve loosely mounted on the screw to permit relative rotation of the screw and valve, a nut engaging the screw and having a limited axial movement relative to the screw and to the valve case, means for limiting the axial movement of the nut, means preventing rotary movement of the nut, means preventing disengage ment of the screw and nut, and a spring exert-- ing pressure upon the nut in the direction of the closing movement of the valve.

In witness whereof we have hereunto set our hands this 29th day of October, 1925.

JAMES REID. GEORGE R. WELCH. 

